=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 140714848598352 (do_monitor           started at [21964] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 5950 try_suggested_sip_codec p 0xb63510 (1)
	/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4d3e26]
	/usr/sbin/asterisk [0x442ce1]
	/usr/sbin/asterisk(_ao2_lock+0x53) [0x442b7d]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c27e4d]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c3ac67]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c1e12f]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c1e1fd]
	/usr/sbin/asterisk(ast_sched_runq+0x16f) [0x536a30]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c77fe1]
	/usr/sbin/asterisk [0x554396]
	/lib64/libpthread.so.0 [0x7ffadcf18070]
	/lib64/libc.so.6(clone+0x6d) [0x7ffadd4040ed]
=== ---> Lock #1 (chan_sip.c): MUTEX 5950 try_suggested_sip_codec p 0x7ffaa022d110 (1)
	/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4d3e26]
	/usr/sbin/asterisk [0x442ce1]
	/usr/sbin/asterisk(_ao2_lock+0x53) [0x442b7d]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c27e4d]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c3ac67]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c1e12f]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c1e1fd]
	/usr/sbin/asterisk(ast_sched_runq+0x16f) [0x536a30]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c77fe1]
	/usr/sbin/asterisk [0x554396]
	/lib64/libpthread.so.0 [0x7ffadcf18070]
	/lib64/libc.so.6(clone+0x6d) [0x7ffadd4040ed]
=== ---> Lock #2 (chan_sip.c): MUTEX 21936 do_monitor &monlock 0x7ffad2ea98a0 (1)
	/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4d3e26]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c18a96]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c77fd5]
	/usr/sbin/asterisk [0x554396]
	/lib64/libpthread.so.0 [0x7ffadcf18070]
	/lib64/libc.so.6(clone+0x6d) [0x7ffadd4040ed]
=== ---> Tried and failed to get Lock #3 (chan_sip.c): MUTEX 3573 retrans_pkt &pkt->owner->owner->lock_dont_use 0x7ffaa0231ae0 (0)
	/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4d3e26]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c1ca02]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c1c54e]
	/usr/sbin/asterisk(ast_sched_runq+0x16f) [0x536a30]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c77fe1]
	/usr/sbin/asterisk [0x554396]
	/lib64/libpthread.so.0 [0x7ffadcf18070]
	/lib64/libc.so.6(clone+0x6d) [0x7ffadd4040ed]
=== -------------------------------------------------------------------
===
=== Thread ID: 140714732861776 (pbx_thread           started at [ 4546] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 1709 ast_hangup &chan->lock_dont_use 0x7ffaa0231ae0 (1)
	/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4d3e26]
	/usr/sbin/asterisk [0x45fc8a]
	/usr/sbin/asterisk(ast_hangup+0x3a8) [0x464f2f]
	/usr/sbin/asterisk [0x4f2dd2]
	/usr/sbin/asterisk [0x4f310b]
	/usr/sbin/asterisk [0x554396]
	/lib64/libpthread.so.0 [0x7ffadcf18070]
	/lib64/libc.so.6(clone+0x6d) [0x7ffadd4040ed]
=== ---> Waiting for Lock #1 (chan_sip.c): MUTEX 5785 sip_hangup p 0x7ffaa022d110 (1)
	/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4d3e26]
	/usr/sbin/asterisk [0x442ce1]
	/usr/sbin/asterisk(_ao2_lock+0x53) [0x442b7d]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c1c503]
	/usr/sbin/asterisk(ast_sched_runq+0x16f) [0x536a30]
	/usr/lib/asterisk/modules/chan_sip.so [0x7ffad2c77fe1]
	/usr/sbin/asterisk [0x554396]
	/lib64/libpthread.so.0 [0x7ffadcf18070]
	/lib64/libc.so.6(clone+0x6d) [0x7ffadd4040ed]
=== --- ---> Locked Here: chan_sip.c line 5950 (try_suggested_sip_codec)
=== -------------------------------------------------------------------
===
=======================================================================